/Engine/Plugins/Online/OnlineFramework/Source/Party/Public/SocialToolkit.h
virtual void NotifyPartyInviteRemoved ( [USocialUser](API\Plugins\Party\User\USocialUser) & SocialUser, const [IOnlinePartyJoinInfo](API\Plugins\OnlineSubsystem\Interfaces\IOnlinePartyJoinInfo) & Invite )